I am purchasing for an academic institution and require an invoice before purchasing. How do I obtain one? Billy McClennan December 03, 2018 15:02 Updated Follow Please submit a request form and a member of our team will prepare an invoice for you. Related articles Is the Hex sold in retail establishments? Can the web app be used to view data in real-time? What do I do if I need to cancel my order? What's included in the box? Can heart rate monitors be paired to the Humon app? Comments 0 comments Article is closed for comments.